Stop all Network Activities

As the name
suggests, the 'Stop all network activity' button instructs the
firewall to immediately cut-off all inbound/outbound communication
between your computer and all available networks (including the
Internet). Connections will remained closed until you re-enable them
by clicking the button a second time. This allows you to quickly take
your computer offline without having to delve into Windows network
settings and without having to unplug any network cables.